You most usually Blackberry service. This popular push mail service from Blackberry has used many people in the world. Blackberry give easily use for sending and receiving email like SMS. But you must spent money to get that service. How if you want that service without spent money? you can get that service like Blackberry just have mobile phone supported POP3/IMAP. This is the tutorial (I use PDA HP Ipaq6365 and can use any type) :

First Step: Create your email account (i'm use gmail), enter inbox->account->new account

Second Step: Enter your email adress

Third Step: Enter your user information, like name, user name and paswword (email)



Fourth Step: Choose your account infotmation (POP / IMAP

Fifth Step: Enter server information (for gmail; incoming mail: pop.gmail.com; outgoing mail: smtp.gmail.com. To another service can see in official website. Then Finish

How to Receiving Email?
You can do just easily step: choose account->conect.

How to Sending Email?
Create your email, after done, tap Send then choose account->conect.

This service can't give reminder if you get new email. If you want that, you can use another application.